I just started using their products and I'm hooked very easy to work with, I've used the silo seal with good results, but now my go to is the C2V3 liquid crystal, and it does give some a rich gloss on my black sand pearl, also some great beading and sheeting of water, I have since mixed some up with disstilled water and made a quick detailer out of the c2v3, with great results, no more high spots and streaks...